198 lines
4.6 KiB
C++
198 lines
4.6 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
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#include "backtrace.hpp"
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#include "debug.hpp"
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#include "log.hpp"
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#include "platform.hpp"
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#include <cstdlib>
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#include <iostream>
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using namespace util::debug;
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////////////////////////////////////////////////////////////////////////////////
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void
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detail::panic (const char *msg)
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{
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std::cerr << "PANIC: " << msg << "\n" << ::debug::backtrace () << std::endl;
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breakpoint ();
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abort ();
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}
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////////////////////////////////////////////////////////////////////////////////
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#if defined(PLATFORM_WIN32)
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#include <windows.h>
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void
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breakpoint (void)
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{
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DebugBreak ();
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}
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#else
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void
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breakpoint (void)
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{
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#if defined (__x86_64) || defined (__i386)
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__asm__ ("int $3;");
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#else
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raise (SIGINT);
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#endif
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}
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#endif
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//-----------------------------------------------------------------------------
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void
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detail::not_implemented (const char *msg)
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{
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panic (msg);
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}
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//-----------------------------------------------------------------------------
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void
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detail::unreachable (const char *msg)
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{
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panic (msg);
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}
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////////////////////////////////////////////////////////////////////////////////
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void
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warn (void)
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{
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warn ("Unusual code path found.");
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}
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//-----------------------------------------------------------------------------
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void
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warn (const std::string &msg)
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{
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warn (msg.c_str ());
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}
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//-----------------------------------------------------------------------------
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void
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warn (const char *msg)
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{
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LOG_WARN (msg);
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}
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////////////////////////////////////////////////////////////////////////////////
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#if defined(PLATFORM_LINUX)
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#include <fenv.h>
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void
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enable_fpe (void)
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{
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feenableexcept (FE_DIVBYZERO | FE_INVALID);
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}
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//-----------------------------------------------------------------------------
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void
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disable_fpe (void)
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{
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feenableexcept (0);
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}
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#else
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// contropfp is not defined supposedly due to a regression in GCC include behaviours.
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//-----------------------------------------------------------------------------
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void
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enable_fpe (void)
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{
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LOG_WARN ("Non-Linux exception code is broken under current GCC.");
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// _clearfp();
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// unsigned int ignored;
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// _controlfp_s (&ignored, _MCW_EM, _MCW_EM);
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}
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//-----------------------------------------------------------------------------
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void
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disable_fpe (void)
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{
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LOG_WARN ("Non-Linux exception code is broken under current GCC.");
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// _clearfp();
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// unsigned int ignored;
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// _controlfp_s (&ignored, 0, _MCW_EM);
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}
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#endif
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////////////////////////////////////////////////////////////////////////////////
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#if defined(PLATFORM_WIN32)
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#include <io.h>
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#include <fcntl.h>
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void
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force_console (void)
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{
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if (!AttachConsole (ATTACH_PARENT_PROCESS))
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return;
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auto out_handle = GetStdHandle (STD_OUTPUT_HANDLE);
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auto err_handle = GetStdHandle (STD_ERROR_HANDLE);
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auto in_handle = GetStdHandle (STD_INPUT_HANDLE);
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auto out_fd = _open_osfhandle (reinterpret_cast<intptr_t> (out_handle), _O_TEXT);
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auto err_fd = _open_osfhandle (reinterpret_cast<intptr_t> (err_handle), _O_TEXT);
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auto in_fd = _open_osfhandle (reinterpret_cast<intptr_t> (in_handle), _O_TEXT);
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auto out_file = _fdopen (out_fd, "w");
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auto err_file = _fdopen (err_fd, "w");
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auto in_file = _fdopen (in_fd, "r");
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/// FILE objects are not reassignable, but Windows doesn't leave us much
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/// choice here.
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*stdout = *out_file;
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*stderr = *err_file;
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*stdin = *in_file;
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setvbuf (stdout, NULL, _IONBF, 0);
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setvbuf (stderr, NULL, _IONBF, 0);
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setvbuf (stdin, NULL, _IONBF, 0);
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ios::sync_with_stdio ();
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// Windows doesn't give an immediate newline when an application is run
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// from a console, so we provide one here for sanity.
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std::cout << "\n";
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std::cerr << "Console installed\n";
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}
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#endif
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////////////////////////////////////////////////////////////////////////////////
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void
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util::debug::init (void)
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{
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#if defined(PLATFORM_WIN32)
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force_console ();
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if (nullptr == LoadLibrary("exchndl.dll")) {
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std::cerr << GetLastError () << "\n";
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LOG_WARNING("Emergency debugger not loaded");
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}
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#endif
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}
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